如何获得输入字段的值？

Question

this is my input field:

$("<td class='testclass'><input id='field-search' value='' type='text'></td>")

How do I get the value of the input field?

I tried it this way:

var mytest =$('#field-search').val();
alert(mytest);

The result is that I get an alert being undefined though the input field has got a value eg 10.

Is there a way to get the value when the value of the input field changes?

A link or an example would be very helpful. Thank you.

Link to the code: http://www.file-upload.net/download-2902420/test.user.js.html

Answer 1

That's because you've not appended that html to the page. Either do that ( someElement.append($("<td>...</td>")); ), or search in that part specifically

var e = $("<td class='testclass'><input id='field-search' value='1' type='text'></td>");
var mytest =e.find('#field-search').val();
alert(mytest);

You don't insert element into the page just by calling $("...") .

Answer 2

In jQuery

var myVal = $('#field-search').val();

In vanilla JavaScript

var myVal = document.getElementById('field-search').value;